Example of launching 3 network requests in on coroutine block. Couroutine get created by artificial wrapper factory API.

ThreeCallModelWithCoroutineProvider.kt

import kotlinx.coroutines.experimental.launch
import kotlinx.coroutines.experimental.android.UI
import kotlinx.coroutines.experimental.async

class Model(private val coroutines: CoroutinesProvider) : ViewModel() {
  
  fun load() {
    coroutines.launch(UI) {
      // Start 3 calls in parallel
      val response1 = api.makeAcall()
      val response2 = api.makeAcall()
      val response3 = api.makeAcall()
      
      // Wait for result and offload work to background thread
      val result = async { 
        combine(response1.await(), response2.await(), response3.await()) 
      }.await()
      
      render(result)
    }
  }
}